Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: Quem foi o fabricante para a corrida na grade 12?
 ###Tabelas: CREATE TABLE 1972_isle_of_man_sidecar_500cc_tt_final_standings (1972_isle_of_man_sidecar_500cc_tt_final_standings_id AUTO_INCREMENT PRIMARY KEY, Place INT, Rider VARCHAR, Country VARCHAR, Machine VARCHAR, Speed VARCHAR, Time VARCHAR, Points INT) CREATE TABLE motogp_classification (motogp_classification_id AUTO_INCREMENT PRIMARY KEY, Rider VARCHAR, Manufacturer VARCHAR, Laps INT, Time VARCHAR, Grid INT) CREATE TABLE commuter_rail_in_buenos_aires (commuter_rail_in_buenos_aires_id AUTO_INCREMENT PRIMARY KEY, Line VARCHAR, Operator VARCHAR, Line length (kilometres) INT, Number of stations INT, Annual ridership (1998) INT, Annual ridership (2008) INT) CREATE TABLE conference_tournament_championships (conference_tournament_championships_id AUTO_INCREMENT PRIMARY KEY, Tournament INT, Conference VARCHAR, Championship Game Opponent VARCHAR, Score VARCHAR, Location VARCHAR, Head Coach VARCHAR) CREATE TABLE shipyards_in_the_program (shipyards_in_the_program_id AUTO_INCREMENT PRIMARY KEY, Yard Name VARCHAR, Location (city, state) VARCHAR, 1st Ship Delivery Date VARCHAR, Total Number of Ways VARCHAR, total vessels built VARCHAR)  
SELECT Manufacturer FROM motogp_classification WHERE Grid = 12